Abstract Ultrafast laser 3D lithography based on non-linear light–matter interactions, widely known as multi-photon (MPL), offers unrivaled precision rapid prototyping and flexible additive manufacturing options. printing equipment MPL is already commercially available, yet there still no comprehensive understanding of factors determining spatial resolution, accuracy, fabrication throughput, repeatability, standardized metrology methods for the accurate characterization produced objects...

In this study, acrylated epoxidized soybean oil (AESO) and mixtures of AESO vanillin dimethacrylate (VDM) or diacrylate (VDA) were investigated as photosensitive resins for optical 3D printing without any photoinitiator solvent. The study photocross-linking kinetics by real-time photorheometry revealed the higher rate pure than that with VDM VDA. Through yield insoluble fraction, better thermal mechanical properties obtained polymer. Here, first time, we validate can be used microstructuring...

Multiphoton photopolymerisation (MPP), also known as 3D nanoprinting, was studied using a wavelength-tunable femtosecond laser. The possibility of any colour the spectrum from 500 to 1200 nm with fixed pulse width 100 fs revealed an interplay photophysical mechanisms more delicate than just two-photon photopolymerisation. An effective order absorption, i.e. X-photon well optimal exposure conditions were assessed for photosensitised and pure SZ2080TM pre-polymer. tunability wavelength greatly...

Abstract The dependence of the polymerization and optical damage thresholds in multi-photon (MPP) lithography was studied using a broadly-tunable laser system with group delay dispersion (GDD) control. order non-linearity light–matter interaction mechanisms were investigated resolution bridges method for non-photosensitized SZ2080 TM photosensitized + IRG369 prepolymers. Energy deposition, voxel dimension growth, size dynamic fabrication window (DFW) measured 700–1300 nm wavelength range at...

Abstract Materials obtained from renewable sources are emerging to replace the starting materials of petroleum-derived plastics. They offer easy processing, fulfill technological, functional and durability requirements at same time ensuring increased bio-compatibility, recycling, eventually lower cost. On other hand, optical 3D printing (O3DP) is a rapid prototyping tool (and an additive manufacturing technique) being developed as choice for efficient low waste production method, yet...

The use of renewable sources for optical 3D printing instead petroleum-based materials is increasingly growing. Combinations photo- and thermal polymerization in dual curing processes can enhance the mechanical properties synthesized thermosets. Consequently, thiol-ene/thiol-epoxy polymers were obtained by combining UV acrylated epoxidized soybean oil linseed with thiols, benzene-1,3-dithiol pentaerythritol tetra(3-mercaptopropionate). Thiol-epoxy reaction was studied calorimetry. changes...

<title>Abstract</title> The two-photon absorption (TPA) and non-linear refraction coefficients β n₂ of SZ2080^TM resist with the photo-initiators (PI) IRG369 BIS (Irgacure 369 4,4' bis(diethylamino)-benzophenone or Michler’s ketone) are determined using Z-scan method at a wavelength 515 nm. nonlinear response host polymer is shown to have considerable contribution energy deposition despite addition PI, as makes up majority 99% in solution. TPA cross section σ = 5.7 ± 0.4...

<title>Abstract</title> Although teeth microcracks (MCs) were recently characterized in three-dimensions (3D), it is still unknown whether there are changes the tooth material within MC compared to uncracked enamel. Thus, spectral analysis of cracked area could provide information on composition along crack line. However, this followed by major methodological challenge – find same using different methods. Therefore, aim study was identify crack-affected and pristine regions combining X-ray...

Recent advances in material engineering have shown that renewable raw materials, such as plant oils or glycerol, can be applied for synthesis of polymers due to ready availability, inherent biodegradability, limited toxicity, and existence modifiable functional groups eventually resulting a potentially lower cost. After additional chemical modifications (epoxidation, acrylation, double bonds metathesis, etc.), they high-tech areas stereolithography, which allows fabrication three-dimensional...

The investigation of biobased systems as photocurable resins for optical 3D printing has attracted great attention in recent years; therefore, novel vanillin acrylate-based were designed and investigated. Cross-linked polymers prepared by radical photopolymerization derivatives (vanillin dimethacrylate diacrylate) using ethyl(2,4,6-trimethylbenzoyl)phenylphosphinate photoinitiator. changes rheological properties examined during the curing with ultraviolet/visible irradiation to detect...

Grid polarisers 3D-printed out of commercial acrilic resin were tested for the polariser function and showed spectral regions where dichroic ratio implying importance molecular and/or stress induced anisotropy. Metal-coated THz optical elements can find a range applications in intensity polarization control IR-THz beams. The used 3D printing method allows fabrication an arbitrary high aspect grid polarisers. Polarization analysis synchrotron radiation was carried with standard stretched...

ABSTRACT Photocross linking of the resins composed plant‐derived monomers, acrylated epoxidized soybean oil (AESO), myrcene (MYR) and vanillin dimethacrylate (VDM) or divinylbenzene (DVB, for comparison), was performed using 2,2‐dimethoxy‐2‐phenylacetophenone as photoinitiator. Photocross‐linking rate properties crosslinked polymers depended on resin compositions. The higher amount MYR caused not only better homogenization lower viscosity but also reduction polymerization worse mechanical...

Rapid development in 3D printing technologies promises a cheap and simple yet reliable way for producing various components structures research numerous science fields. This work is dedicated to investigate the possibility use fused filament fabrication based fabricate microchannels microfluidical applications as well diverse scaffolds biomedical applications. We also examine further improve fabricated by employing an ultrafast laser, namely laser light filamentation using direct writing....

Abstract Topography of the scaffold is one most important factors defining quality artificial bone. However, production precise micro‐ and nano‐structured scaffolds, which known to enhance osteogenic differentiation, expensive time‐consuming. Meanwhile, little about macro‐patterns (larger than cell diameter) effect on fate, while this kind structures would significantly facilitate manufacturing skeleton. Therefore, research focused polylactic acid scaffold's macro‐pattern impact rat's dental...

Abstract Although the topic of tooth fractures has been extensively analyzed in dental literature, there is still insufficient information about potential effect enamel microcracks (EMCs) on underlying structures. For a precise examination extent damage to structure area EMCs, it necessary carry out their volumetric [(three-dimensional (3D)] evaluation. The aim this study was validate an X-ray micro-computed tomography ( $$\mu $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">...

Vitrimers have gained attention as materials with recyclability, self-healing, and shape memory properties.The use of bio-based monomers for the synthesis vitrimers is relevant because an environmentally friendly strategy.In this work, resins based on 2-hydroxy-2-phenoxypropyl acrylate acrylated epoxidized soybean oil were designed tested by real-time photorheometry, Fourier transform infrared spectroscopy (FT-IR), mechanical testing to determine suitability digital light processing 3D...

Purpose The purpose of this paper is the design and investigation novel acrylated epoxidized soybean oil-based photocurable systems as candidate materials for optical 3D printing. Design/methodology/approach Aromatic dithiols, benzene-1,3-dithiol or benzene-1,4-dithiol, were used cross-linking agents oil in these systems. Kinetics photocross-linking was investigated by real-time photorheometry using two different photoinitiators, 2, 2-dimethoxy-2-phenylacetophenone...

Abstract Laser direct writing employing multi-photon 3D polymerisation is a scientific and industrial tool used in various fields such as micro-optics, medicine, metamaterials, programmable materials, etc., due to the fusion of high-throughput fine features down hundreds nm. Some limitations technology applicability emerge from photo-resin properties, however any material modifications can strongly affect its printability, photoexcitation conditions alter well. Here we present...

Novel thermo-responsive shape-memory vanillin-based photopolymers have been developed for microtransfer molding. Different mixtures of vanillin dimethacrylate with tridecyl methacrylate and 1,3-benzenedithiol tested as photocurable resins. The combination the different reaction mechanisms, thiol-acrylate photopolymerization, acrylate homopolymerization, that were tuned by changing ratio monomers, resulted in a wide range thermal mechanical properties obtained. All polymers demonstrated great...

A novel dual cure photopolymerizable system was developed by combining two plant-derived acrylic monomers, acrylated epoxidized soybean oil and vanillin dimethacrylate, as well the thiol monomer pentaerythritol tetrakis (3-mercaptopropionate). Carefully selected resin composition allowed researchers to overcome earlier stability/premature polymerization problems obtain stable (up six months at 4 °C) selectively-polymerizable resin. The demonstrated rapid photocuring without an induction...

Stereolithography (SLA) allows rapid and accurate materialization of computer aided design (CAD) models into real objects out photoreactive resin. Nowadays this technology has evolved to a widespread simple flexible personal tabletop devices - three dimensional (3D) optical printers. However, most 3D SLA printers use commercially available resins which are not cheap limited applicability, often unknown chemical ingredients fixed certain mechanical properties. For advanced research, it is...